EP0672503B1 - Adjustable wrench - Google Patents
Adjustable wrench Download PDFInfo
- Publication number
- EP0672503B1 EP0672503B1 EP94301805A EP94301805A EP0672503B1 EP 0672503 B1 EP0672503 B1 EP 0672503B1 EP 94301805 A EP94301805 A EP 94301805A EP 94301805 A EP94301805 A EP 94301805A EP 0672503 B1 EP0672503 B1 EP 0672503B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adjustment bolt
- head
- hole
- handle
- receiving hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/10—Spanners; Wrenches with adjustable jaws
- B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
- B25B13/16—Spanners; Wrenches with adjustable jaws the jaws being slidable by screw or nut
Definitions
- the present invention relates to an adjustable wrench.
- the conventional adjustable wrench is generally provided with a fixed jaw and a movable jaw, which form together a clamping mouth for fastening or loosening a fastener such as a hexagonal nut or bolt head.
- a prior art adjustable wrench as described above is defective in design in that it often fails to hold a nut or bolt head firmly at the time when the nut or the bolt head is twisted strenuously, and that the movable jaw is vulnerable to cracking.
- an adjustable double-ended box wrench including a wrench body defining large and small box wrenches, an adjustable jaw assembly including an elongated adjusting member and a rotatable adjuster that moves jaw end surfaces to adjust the sizes of the wrenches, and a cover plate that is secured to the wrench body to retain the adjustable jaw assembly.
- Each of the large and small box wrenches includes a pair of associated diverging portions and a pair of converging portions as well as an associated connecting portion that connect the associated engagement portions.
- Each of the connecting portions preferably has a connecting wall with curved ends that are tangential to associated engagement surfaces in order to prevent stress concentration during use.
- the rotatable adjuster is an adjusting nut that receives an externally threaded portion of the associated adjusting member to provide the adjustment. In another embodiment of the wrench, the rotatable adjuster is an adjusting screw that receives an internally threaded portion of the associated adjusting member to provide the adjustment.
- an adjustable wrench comprising:
- FIG. 1 shows a perspective view of a preferred embodiment of the present invention.
- FIG. 2 shows a sectional view of a portion taken along the line 2-2 as shown in FIG. 1.
- FIG. 3 shows a sectional view of a portion taken along the line 3-3 as shown in FIG. 1.
- FIG. 4 shows a top plan view of the preferred embodiment of the present invention.
- FIG. 5 is a top plan view of the preferred embodiment in use under a first condition, according to the present invention.
- FIG. 6 shows a top plan view of the preferred embodiment in use under a second condition, according to the present invention.
- an adjustable wrench 10 embodied in the present invention is shown to comprise a handle 12 and a rectangular head 14 formed integrally at one end of the longitudinal axis of the handle 12. Located at another end of the longitudinal axis of the handle 12 is a hang hole 16.
- the head 14 has an upper surface 18 and a lower surface 20, which are parallel to each other. The distance between the upper and the lower surfaces 18 and 20 is greater than the thickness of the handle 12.
- the longitudinal axis of the handle 12 has one end that is connected with one end of the longitudinal axis of the head 14 so as to form a shoulder 22 at the junction between the handle 12 and the head 14.
- the handle 12 is slanted upwards at a predetermined angle, such as an angle of 15 degrees, from the junction between the handle 12 and the head 14 for facilitating the wrenching operation.
- the head 14 is provided with a fastener receiving hole 24 for receiving a hexagonal nut or bolt head, the receiving hole 24 having two fixed clamping surfaces 26 and 28 which are opposite in location to each other and are located at one end farther from the handle 12. These two fixed clamping surfaces 26 and 28 are located on opposite sides of the longitudinal axis X-X' of the head 14 such that the two fixed clamping surfaces 26 and 28 are equidistant from the axis X-X'.
- the two imaginary planes, as shown by the dotted lines in FIG. 4, containing the two fixed clamping surfaces 26 and 28 meet at an angle of 60 degrees.
- a top surface 30 is provided perpendicular to the longitudinal axis X-X' of the head 14. The top surface 30 is respectively connected with one end of each of the two fixed clamping surfaces 26 and 28, with another end of each of the two fixed clamping surfaces 26 and 28 being connected respectively with two inner surfaces 32 and 34.
- the head 14 is provided with a through hole 36 which is located between the surface of the receiving hole 24 and the shoulder 22 and is parallel to or coaxial with the longitudinal axis X-X'. Located between the end of the receiving hole 24 near the handle 12 and the handle 12 is a receiving hole 38 in communication with the through hole 36.
- a rotation knob 40 is disposed in the receiving hole 38.
- An adjustment bolt 42 is disposed through the through hole 36 and the ring hole 44 of the rotation knob 40 such that one end of the adjustment bolt 42 is received in the receiving hole 24.
- the adjustment bolt 42 is provided therein axially with a groove 46.
- a locating pin 48 is fastened to a partition wall 50 located between the receiving hole 24 and the receiving hole 38, with the inner end of the locating pin 48 being received in the through hole 36 and being retained in the groove 46.
- the ring hole 44 of the rotation knob 40 is provided with threads engageable with threads of the adjustment bolt 42.
- the adjustment bolt 42 is caused to move linearly in the direction of the axis thereof. It is suggested that the dimension of the rotation knob 40 is such that the surface of the rotation knob 40 is higher than the upper surface 18 of the head 14 when the rotation knob 40 is disposed in the receiving hole 38.
- Such an arrangement of the rotation knob 40 as described above is intended to facilitate the turning of the rotation knob 40.
- the adjustment bolt 42 has a penetration end 54 located in the receiving hole 24 and provided with a flat end surface 56.
- An arresting block 58 has a through hole 60 in which the penetration end 54 is held.
- a surface 62 of the arresting block 58 is coplanar with the flat end surface 56.
- the surface 62 and the flat end surface 56 form a movable clamping surface 64 contained in an imaginary plane which meets the two imaginary planes containing the two fixed clamping surfaces 28 and 26 at an angle of 60 degrees, as shown by the dotted lines in FIG. 4.
- the receiving hole 24 is composed of two fixed clamping surfaces 26 and 28, and the movable clamping surface 64, which are corresponding respectively in location to three noncontiguous sides of a hexagonal nut or bolt head and which form together a clamping space adjustable in dimension to accommodate a number of hexagonal nuts or bolt heads of various dimensions.
- the penetration end 54 of the arresting block 58 serves to enlarge the area of the movable clamping surface 64.
- the space of the fitting hole 24 is enlarged by a recess 66 located at the end adjacent to the handle 12 and dimensioned to accommodate therein the arresting block 58.
- the receiving hole 24 is first fitted over the nut 70 or the bolt head 80 such that the fixed clamping surfaces 26 and 28 of the wrench 10 are respectively in contact with the opposite sides 72 and 74 of the nut 70 or with the oposite sides 82 and 84 of the bolt head 80. Thereafter, the rotation knob 40 is turned until such time when the movable clamping surface 64 of the adjustment bolt 42 of the wrench 10 is intimately in contact with a lower side 76 or 86 of the hexagonal nut 70 or bolt head 80. As a result, the nut 70 or the bolt head 80 can be turned in the direction of a wrenching movement of the handle 12.
- the adjustable wrench 10 of the present invention has inherent advantages over the prior art adjustable wrench.
- the adjustable wrench 10 of the present invention is provided with a rotation knob 40 which makes the job of adjusting the size of the clamping space relatively easy.
- the clamping space of the adjustable wrench 10 of the present invention is formed by three clamping surfaces which meet respectively at an angle of 60 degrees. As a result, a hexagonal nut or bolt head can be held securely in the clamping space of the adjustable wrench 10 of the present invention.
- the torsion of a wrenching movement of the handle 12 of the adjustable wrench 10 of the present invention is equally exerted on the three clamping surfaces, which are therefore less vulnerable to a crack caused by a strenuous twist of the hexagonal nut or bolt head.
Abstract
Description
characterised in that:
Claims (4)
- An adjustable wrench (10) comprising:a handle (12);a head (14) formed integrally at one end of the longitudinal axis of said handle (12) and provided with an upper surface (18), a lower surface (20) parallel to said upper surface (18), and a fastener receiving hole (24) extending through said head (14) from said upper surface (18) to said lower surface (20), said fastener receiving hole (24) having two fixed clamping surfaces (26, 28) perpendicular to said upper and lower surfaces (18, 20) and symmetrical about a plane of symmetry containing the longitudinal axis of the wrench (10), said two fixed clamping surfaces (26, 28) being contained in two imaginary planes which extend in a direction opposite to said handle (12) and which meet at an angle of 60 degrees; andan adjustment bolt (42) mounted in said head (14) such that said adjustment bolt (42) is prevented from rotation but is able to move linearly along an axis thereof, which axis is contained in said plane of symmetry, and such that a penetration end (54) of said adjustment bolt (42) protrudes into said fastener receiving hole (24), said penetration end (54) being provided with a movable clamping surface (64) perpendicular to said upper and lower surfaces (18, 20) of said head (14) so that said movable clamping surface (64) is contained in an imaginary plane which is perpendicular to said plane of symmetry and which intersects each of said imaginary planes containing said two fixed clamping surfaces (26, 28) at an angle of 60 degrees;said head (14) being further provided with a rotation knob (40) received in a knob receiving hole (38) in the head (14), the rotation knob (40) having an central bore (44) through which the adjustment bolt (42) extends, the central bore (44) being provided with threads engaging with threads on the adjustment bolt (42), thereby enabling the adjustment bolt (42) to be axially moved by turning the rotation knob (40).
characterised in that:said penetration end (54) of said adjustment bolt (42) has a flat end surface (56) which is perpendicular to the axis of said adjustment bolt (42) and is provided with an arresting block (58) fastened thereto, said arresting block (58) having an end surface (62) coplanar with said flat end surface (56) of said penetration end (54) of said adjustment bolt (42) for cooperating with said flat end surface (56) to form said movable clamping surface (64);said fastener receiving hole (24) is provided with a recess (66) which is dimensioned to receive therein said arresting block (58) and which is located in the end of said fastener receiving hole (24) nearest to said handle (12); andsaid adjustment bolt (42) is provided with a groove (46) extending in the direction of the axis of said adjustment bolt (42) and retaining therein one end of a locating pin (48) fastened to said head (14) such that said one end thereof is inserted into said groove (46) so as to permit said adjustment bolt (42) to move only linearly and axially when said rotation knob (40) is turned. - An adjustable wrench (10) as claimed in claim 1 wherein said handle (12) extends at a predetermined angle relative to said upper and lower surfaces (18, 20) of said head (14).
- An adjustable wrench (10) as claimed in claim 2 wherein said upper and lower surfaces (18, 20) of said head (14) are separated by a distance greater than the distance between an upper surface and a lower surface of said handle (12); wherein said handle (12) and said head (14) meet at a shoulder (22); and wherein said head (14) is provided with a through hole (36) which is located between said shoulder (22) and a surface of said fastener receiving hole (24) and is in communication with said knob receiving hole (38), with said adjustment bolt (42) being disposed in said through hole (36) such that said adjustment bolt (42) can be caused to move linearly in the direction of the axis of said through hole (42).
- An adjustable wrench (10) as claimed in claim 3 wherein said two fixed clamping surfaces (26, 28) are located respectively on opposite sides of said plane of symmetry such that said two fixed clamping surfaces (26, 28) are equidistant from said longitudinal axis; and wherein said axis of said through hole (36) is parallel to said longitudinal axis of said head (14).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69410591T DE69410591T2 (en) | 1994-03-14 | 1994-03-14 | Adjustable wrench |
EP94301805A EP0672503B1 (en) | 1994-03-14 | 1994-03-14 | Adjustable wrench |
AT94301805T ATE166605T1 (en) | 1994-03-14 | 1994-03-14 | ADJUSTABLE WRENCH |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94301805A EP0672503B1 (en) | 1994-03-14 | 1994-03-14 | Adjustable wrench |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0672503A1 EP0672503A1 (en) | 1995-09-20 |
EP0672503B1 true EP0672503B1 (en) | 1998-05-27 |
Family
ID=8217613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94301805A Expired - Lifetime EP0672503B1 (en) | 1994-03-14 | 1994-03-14 | Adjustable wrench |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0672503B1 (en) |
AT (1) | ATE166605T1 (en) |
DE (1) | DE69410591T2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2481962A (en) * | 2010-05-13 | 2012-01-18 | Graham Downey | Nut extractor |
US20110277598A1 (en) * | 2010-05-17 | 2011-11-17 | Ee Jig Kim | Adjustable socket wrench |
CN106625360A (en) * | 2016-11-30 | 2017-05-10 | 南京海獭软件有限责任公司 | Adjustable spanner |
CN109551410A (en) * | 2018-12-18 | 2019-04-02 | 杭州巨星科技股份有限公司 | Adjustable clamp structure and wrench socket |
CN113146552A (en) * | 2021-04-25 | 2021-07-23 | 中国人民解放军空军工程大学航空机务士官学校 | Steel cable joint braiding clamp |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4488461A (en) * | 1981-11-20 | 1984-12-18 | Encor, Limited | Adjustable wrench |
US4520699A (en) * | 1983-05-02 | 1985-06-04 | Miodrag Jeremic | Adjustable wrench |
US4787275A (en) * | 1987-03-20 | 1988-11-29 | Colvin David S | Adjustable double-ended box wrench |
DE8804852U1 (en) * | 1988-03-07 | 1988-06-01 | Lee, Juang-Jeng, Taipeh/T'ai-Pei, Tw | |
US4967613A (en) * | 1989-07-11 | 1990-11-06 | Sde Investments, Inc. | Reversible adjustable wrench |
-
1994
- 1994-03-14 AT AT94301805T patent/ATE166605T1/en not_active IP Right Cessation
- 1994-03-14 EP EP94301805A patent/EP0672503B1/en not_active Expired - Lifetime
- 1994-03-14 DE DE69410591T patent/DE69410591T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69410591T2 (en) | 1998-09-24 |
DE69410591D1 (en) | 1998-07-02 |
ATE166605T1 (en) | 1998-06-15 |
EP0672503A1 (en) | 1995-09-20 |
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